The "blood handprint", a martial arts secret, suddenly appeared in the martial arts world, leading to a strange case. Peng Yutian, the most unreliable detective of the Six Gates, was ordered to investigate. After arriving at Luoyang Qingyun Pavilion, troubles arose. In order to maintain the reputation of the Six Gates, Peng Yutian had no choice but to bite the bullet and investigate from various tricky angles, making a lot of jokes, and finally leading to a touching story of mother-daughter affection, and justice was served.